Dental Radiography Module 2 Flashcards
What is the atomic number?
The atomic number Z is the number of protons in the nucleus
protons have a….. charge?
Positive
Electrons have a…..charge?
Negative
Neutrons have a……charge?
no charge
what is an isotope?
protons and neutrons in the nucleus are not of equal number
what is a radioisotope?
isotope with unstable nuclei which undergo radioactivedisintegration (radioactive)
++
what is the number of the k shell?
2
Removing an electron from a shell is known as?
Ionsiation
If an electron is moved from an inner shell to an outer shell containing more energy the atom remains neutral but the process is called?
Exitation
What percentage produce xrays?
Only 1% of collisions produceX-Rays
Characteristic Radiation happens when a projectile electron interacts with….?
Inner shell electron
Name the Interactions of X-Rays with Matter…?
Scattered
Absorbed
Attenuated
Transmitted
What is scattered interaction….?
they are deflected from their original path and carry on travelling in a different direction, no loss of energy
What is absorption?
total loss of energy
pure absorption –the ‘Photoelectriceffect’
what is attenuated?
a combination of absorption and scattering which will reduce the intensity of the beam.
the ‘Compton effect’
